minor change in computation of beta weights using mrdivide

git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@7709 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0
documentation - fixed typo

git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@7710 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0
enhancement - allow for thresholding when cfg.threshold is specified

git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@7711 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0
Merge branch 'master' of github.com:fieldtrip/fieldtrip